Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ed6c301e554269…

MALICIOUS

PDF

74.5 KB Created: 2021-09-11 16:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9f06a2690af465c07d878b70957700b SHA-1: 7312ef4f9e8604a6ac66acf0700c2494b73d5167 SHA-256: e9ed6c301e55426965b09f0fd9881b464595de1edde1dfef32360a9a44edded8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious sites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the interpretation of this file as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://hondasushi.com/uploads/files/43932052215.pdf In PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/79418d4d1cb3b676c87190ed45661927/soxowunabowunige.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/wolafapogudojovu.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/vikexidolukenuwizipogutiw.pdfIn PDF document text
    • http://ametansk.ru/uploads2/55096456918.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136e94a73d9a---faruwujavonugiguxas.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/55762148459.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3a9f33b52d4b07891eeaa7de4097fa0c/49455094324.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/18813198514.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/83998835776.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/53469971570.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/zosefidoxilotawomud.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/98611529895.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/xupojolirumugorosunijidi.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161366ac5a2c6b---kidebesapasekafiwi.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/5726589887.pdfIn PDF document text
    • http://honghuibio.com/d/files/xodunadadefomivusus.pdfIn PDF document text
    • http://capableapp.com/uploads/files/16754001100.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/70235219675.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16136e726d71e0---wudam.pdfIn PDF document text
    • http://e-hematologica.com/users/file/75795805146.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109051220204904.pdfIn PDF document text
    • https://peperita.it/writable/public/userfiles/file/6327156068.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=instagram+apk+download+iosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DB 16228 bytes
SHA-256: 0fda27b5538f2462c4055087c67d90c35f34eff4441c5af8592a9cc3febb47ac
font_01_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 10732 bytes
SHA-256: 22722b71ed3b37c630afe46b2b621ba3218986b6a04b8acba0617607c42edc0d
font_02_sfnt_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1